EVAL-AD7991EBZ Analog Devices Inc, EVAL-AD7991EBZ Datasheet - Page 4

• Manufacturer Part Number: EVAL-AD7991EBZ
• Description: BOARD EVAL FOR AD7991
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD7991EBZ

• Number Of Adc's: 1
• Number Of Bits: 12
• Sampling Rate (per Second): 1M
• Data Interface: Serial
• Inputs Per Adc: 4 Single Ended
• Input Range: 0 ~ Vdd
• Power (typ) @ Conditions: 4.4mW @ 5.5 V, 3.4MHz
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Utilized Ic / Part: AD7991
• Silicon Manufacturer: Analog Devices
• Application Sub Type: ADC
• Kit Application Type: Data Converter
• Silicon Core Number: AD7991
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

EVAL-AD7991/AD7995
LINK OPTIONS
Fourteen link options must be set to change the configuration of the circuits. The functions of these link options are summarized
in Table 2. The positions of the links can be changed when the evaluation board is connected to the power supply.
Table 2.
Link No.
LK1, LK2, LK5
LK3, LK4, LK6,
LK7
LK 8
LK9
LK10
LK11, LK12, LK13,
LK14
SOCKET
There are six input sockets relevant to the operation of the
AD7991/AD7995 on this evaluation board. The functions of
these sockets are outlined in Table 3.
Table 3. Socket Functions
Socket
AN0
AN1
AN2
AN3
J3
J6
Function
Subminiature BNC (SMB) Connector. The analog input
signal for the V
this socket.
Subminiature BNC (SMB) Connector. The analog input
signal for the V
this socket.
Subminiature BNC (SMB) Connector. The analog input
signal for the V
this socket.
Subminiature BNC (SMB) Connector. The analog input
signal for the V
this socket.
Subminiature BNC (SMB) Connector. This socket is
connected to the SDA track on the evaluation board.
Subminiature BNC (SMB) Connector. This socket is
connected to the SCL track on the evaluation board.
Changes the value of the external reference voltage.
Function
Connects the input of V
digital potentiometer AD5245.
Ties the operational amplifiers to the analog inputs of the AD7991/AD7995.
Selects the power source for V
Ties the operational amplifiers to the analog inputs of the AD7991/AD7995.
Connects the input of V
Connects the power supply pins of the operational amplifiers to 3.6 V regulated output from the on-board ADP3330
voltage regulators, or to 5 V supply from J1.
In Position A, V
In Position B, V
In Position A, the operational amplifier is used.
In Position B, the operational amplifier is not used.
In Position A, selects the 5 V supply from the USB connector.
In Position B, selects the 3.3 V regulated output from the on-board ADP3303 voltage regulator.
In Position A, the operational amplifier is used.
In Position B, the output from LK 9 is connected to A3/VREF input.
If link is inserted, the reference voltage is 3 V.
If link is not inserted, the reference voltage is 2.5 V.
In Position A, V
In Position B, V
In Position C, Channel 3 is used as external reference input for the AD7991/AD7995.
In Position A, operational amplifier is supplied from J1.
In Position B, operational amplifier is supplied from ADP3330.
IN
IN
IN
IN
0 of the AD7991/AD7995 is applied to
1 of the AD7991/AD7995 is applied to
2 of the AD7991/AD7995 is applied to
3 of the AD7991/AD7995 is applied to
IN
IN
IN
IN
X is connected to the ANx input socket.
3 is connected to the AN3 input socket.
X is connected to the digital potentiometer.
3 is connected to a digital potentiometer.
IN
IN
0, V
3 to the AN3 input socket to a digital potentiometer or to a high precision reference voltage.
IN
1, and V
DD
on the AD7991/AD7995.
IN
2 to the AN0, AN1, and AN2 input sockets, respectively, or to the output of the
Rev. 0 | Page 4 of 12
USB CONNECTOR
A standard USB connector, J1, is used to connect the evaluation
board to the USB port of a PC. A standard USB connector cable
is included with the AD7991/AD7995 evaluation board kit.
Because the USB connector powers the board, there is no need
for an external power supply.
Communication between the AD7991/AD7995 evaluation
board and the PC is over the USB interface. The on-board USB
controller controls this communication.